Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Smart Shear from Siemens VAI – a New Hydraulically Operated Plate Shear for Improved Cutting Quality and Increased Cutting Speed

15.10.2008
Siemens VAI Metals Technologies has developed a new hydraulically operated rolling blade shear for cutting applications in heavy-plate rolling mills. Compared to conventional mechanical shears, “Smart Shear” is intended to improve cutting quality, increase the cutting speed, simplify maintenance and enable greater flexibility. The Smart Shear concept is suitable for use as a crop shear or a divide shear.

Due to the rising demand for high-strength types of steel and for plates with a greater thickness and width, the requirements placed on plate mill shears have increased dramatically. The shears and their components are being subjected to much greater forces. At the same time, uneven cuts or imprecisely cut edges have to be avoided. The mechanically operated shears available on the market are at the limit of their capabilities.

In the case of Smart Shear, servo-controlled hydraulic cylinders are used on both sides of the shears in order to operate the top blade. A rolling cut action is therefore possible without the gears, shafts and cranks needed for mechanical shears. The top knife and the bottom knife are mounted directly on the blade beams. This reduces the number of moving parts and thus susceptibility to wear as well as the need for maintenance. Simulations have demonstrated a considerably better control of cutting angle and blade overlap compared to mechanical shears. The servo-controlled movement of the shears ensures that the correct cutting angle is achieved for all plate thicknesses.

The blade overlap is kept practically constant over the entire width of the plate. This improves the cutting quality. Moreover, the blade overlap can easily be adapted to the optimum value for the respective thickness and width by means of the control software. In addition, the Smart Shear concept enables higher cutting speeds than mechanical shears. The cutting speed of mechanical shears cannot easily be increased because the larger torque needed for increasing the speed requires a design that, in turn, increases the inertia of the drive system.

In order to improve operational flexibility, Smart Shear is equipped with two pairs of hydraulic cylinders. Both pairs of cylinders are used at the same time for cutting high-strength or thick metal plates. When thin plates or lower-strength material has to be cut, only one pair of cylinders is used. The cutting speed can easily be adapted to the requirements in each case.

The hydraulic cylinders are operated in tension. As a result, the vertical forces are constrained within the top and bottom knife beams and the cylinders. The side frames are not subjected to the vertical forces. They only have to withstand the horizontal blade forces and thus can be much lighter.

The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of production, transportation and building systems. Integrated hardware and software technologies combined with comprehensive industry-specific solutions enable Siemens to enhance the productivity and efficiency of its customers in industry and infrastructure. The Sector comprises six Divisions: Building Technologies, Industry Automation, Industry Solutions, Mobility, Drive Technologies and Osram. In fiscal 2007 (ended September 30), Siemens Industry generated sales of approximately EUR40 billion (pro forma, unconsolidated) with around 209,000 employees worldwide.

With the business activities of Siemens VAI Metal Technologies, (Linz, Austria), Siemens Water Technologies (Warrendale, Pa., U.S.A.), and Industry Technologies, (Erlangen, Germany), the Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities.

Using its own products, systems and process technologies, Industry Solutions develops and builds plants for end customers, commissions them and provides support during their entire life cycle.

Dr. Rainer Schulze | Siemens Industry Solutions
Further information:
http://www.siemens.com/metals
http://www.siemens.com/industry
http://www.siemens.com/industry-solutions

More articles from Machine Engineering:

nachricht PRESTO – Highly Dynamic Powerhouses
15.05.2017 | JULABO GmbH

nachricht Making lightweight construction suitable for series production
24.04.2017 | Laser Zentrum Hannover e.V.

All articles from Machine Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

Im Focus: On the way to a biological alternative

A bacterial enzyme enables reactions that open up alternatives to key industrial chemical processes

The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....

Im Focus: The 1 trillion tonne iceberg

Larsen C Ice Shelf rift finally breaks through

A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...

Im Focus: Laser-cooled ions contribute to better understanding of friction

Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision

Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

NASA looks to solar eclipse to help understand Earth's energy system

21.07.2017 | Earth Sciences

Stanford researchers develop a new type of soft, growing robot

21.07.2017 | Power and Electrical Engineering

Vortex photons from electrons in circular motion

21.07.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>